Chemical Reactions: Question Preview (ID: 2289)


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Which list includes three types of chemical reactions?
a) condensation, double replacement, sublimation b) decomposition, solidification, sublimation c) decomposition, double replacement, synthesis d) condensation, solidification, synthesis
Given the balanced equation: 2 KClO3 --> 2 KCl + 3 O2. Which type of reaction is represented by this equation?
a) synthesis b) double replacement c) single replacement d) decomposition
Given the incomplete equation: 4 Fe + 3 O2 --> 2X. Which compound is represented by X?
a) FeO b) Fe3O4 c) Fe3O2 d) Fe2O3
Which metal reacts spontaneously with a solution containing zinc ions?
a) magnesium b) silver c) copper d) nickel
Given the reaction: Mg + 2 AgNO3 --> 2 Ag + Mg(NO3)2. What type of reaction is represented?
a) synthesis b) double replacement c) single replacement d) decomposition
Given the unbalanced equation _Fe2O3 + _CO --> _Fe + _CO2. When the equation is correctly balanced using the smallest whole-number coefficients, what is the coefficient of CO?
a) 1 b) 4 c) 3 d) 2
If an equation is balanced properly, both sides of the equation must have the same number of
a) atoms b) moles of molecules c) molecules d) coefficients
What is the total number of oxygen atoms in the formula MgSO4•7H2O? [The • represents
a) 11 b) 4 c) 5 d) 7
The burning of magnesium involves the conversion of
a) chemical energy to mechanical energy b) chemical energy to heat energy c) heat energy to chemical energy d) heat energy to mechanical energy
Given the unbalanced equation: _Al + _O2 --> _Al2O3. When this equation is correctly balanced using smallest whole numbers, what is the coefficient of O2(g)?
a) 6 b) 2 c) 3 d) 4
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